16440371843 has 16 divisors (see below), whose sum is σ = 19061452800. Its totient is φ = 13887568800.

The previous prime is 16440371837. The next prime is 16440371861. The reversal of 16440371843 is 34817304461.

It is not a de Polignac number, because 16440371843 - 2¹⁰ = 16440370819 is a prime.

It is a super-3 number, since 3×16440371843³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16440371843.

It is not an unprimeable number, because it can be changed into a prime (16440371833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1575758 + ... + 1586156.

It is an arithmetic number, because the mean of its divisors is an integer number (1191340800).

Almost surely, 2^16440371843 is an apocalyptic number.

16440371843 is a deficient number, since it is larger than the sum of its proper divisors (2621080957).

16440371843 is a wasteful number, since it uses less digits than its factorization.

16440371843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13658.

The product of its (nonzero) digits is 193536, while the sum is 41.

The spelling of 16440371843 in words is "sixteen billion, four hundred forty million, three hundred seventy-one thousand, eight hundred forty-three".